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Focal Polyglass 170 V

6-3/4" component speaker system

Item #: 091170V

2 Reviews

This item is no longer available.

Original Price: $299.99

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Focal's Polyglass V component systems use precision craftmanship and advanced materials to make a strong sonic impression. Each system includes two tweeters, two woofers, two crossover networks, grilles, and assorted hardware.

2-layer woofer cone and ABS basket
The 170 V system features a 6-3/4" woofer with a Polyglass cone that's created by depositing a layer of hollow glass microbeads over a layer of cellulose pulp. This unique material combines the warm sound of cellulose with the incredible strength of glass, for a cone that responds rapidly with extremely low resonance. The basket is made from a fiberglass/ABS mixture, providing a non-magnetic, non-resonant housing that won't color the sound. A butyl rubber surround helps control cone movement and promotes high power handling.

Aluminum/magnesium tweeter
Focal designed the aluminum/magnesium inverted dome tweeter to disperse high frequencies evenly for a big, open soundstage. The external 2-way crossover ensures a smooth transition from lows to highs, so vocals and instruments sound natural. Grilles are included.

Product Highlights:

  • 6-3/4" component speaker system (includes 2 woofers, 2 tweeters, 2 crossover networks, and hardware)
  • Polyglass woofer with butyl rubber surround
  • aluminum/magnesium inverted dome tweeter
  • fiberglass/ABS basket
  • outboard crossover
  • grilles included
  • 6-60 watts RMS power range (120 watts peak)
  • frequency response: 60-20,000 Hz
  • sensitivity: 91 dB
  • depth: 2-1/4"
  • warranty: 1 year
  • Our 60-day money-back guarantee

Why install component speakers?

A component speaker system gives you the best possible performance from your car audio system. A system consists of separate woofers, tweeters, and crossovers, each designed to cover one specific range of frequencies. As separate components, the woofer can move freely to deliver more powerful performance, while the tweeter can be custom-mounted in a better spot up closer to your ears, revealing a whole new world of detail. Separate crossovers are far superior to the simple filters wired into full-range speakers, so the components work together for smoother, more focused sound.

Focal Polyglass 170 V Reviews

Average Customer Review:

2 Reviews

Great speakers, need breaking in

Written by: Wawatusi from NJ on December 8, 2013

2011 Mercedes-Benz C-Class
Crutchfield Customer Review (What's this?)

These are great speakers, I bought and fitted a second pair int he back of my c300' (they fit crutchfield), they sound harsh at first, but warm up as eye broke in. Also, Hespe seem to do best with the crossover to a sub at around 80-90hz.

Pros: Great sound

Cons: Break in time, harshness at first,

A notch above the others

Written by: Anonymous from La Jolla CA on November 8, 2013

Crutchfield Customer Review (What's this?)

initially I had placed a set of Polk Audio DXi6501 in, and found them wanting just a tad in the lower and mid range, and at lower volume. While the Focal's are markedly better across the board, I will say that you have to be rather picky to tell the difference. However a lot of what I listen to is at volume of 7-10, and I couldn't be happier. Make sure you combine a solid player and amp with these, or you'll be wasting your money. And by the by...a four coming from me is great. When it comes to speakers I have yet to find a five.

Pros: Great sound across the board - gets rid of the tinny sound so common in components - mid range - low vilume is awesome.

Cons: A little on the expensive side - but semi discerning ears will hear the difference.

Hands-on research

What's in the box?

Download owner's manual

  • Two 6-3/4" Woofers
  • Two TN44 inverted dome tweeters (with attached 5" length of speaker wire)
  • 2 Tweeter flush mount cups (installed)
  • 2 Tweeter angle mount cups
  • 2 Crossover networks
  • 2 Tweeter flush mount clamps
  • 2 Woofer mounting/spacer rings
  • 2 Woofer flange covers
  • 4 Adhesive backed foam gaskets
  • 6 Large speed clips
  • 8 Standard speed clips
  • Four 3/4" Flathead screws
  • 8 small 1" Panhead screws
  • 8 Large 3/4" Panhead screws
  • 8 Medium 5/8" Panhead screws
  • 10 Small 5/8" Panhead screws
  • 4 Flat washers
  • 8 Eyelet washers
  • Six 4" Wiring adapters
  • Six 10" Wiring adapters
  • Owner's manual (English/ French)
  • Focal window sticker

Features and Specs

Speaker Size 6 3/4
Design 2-way
Tweeter Design Inverted Dome
Tweeter Composition Aluminum
Woofer Composition Polyglass-coated Celluose
Woofer Surround Butyl Rubber
Parts Warranty 1 Year
Labor Warranty 1 Year
Sensitivity 91 dB
Frequency Response 60 - 20k Hz
RMS Power Range (Watts) 6-60
Peak Power Handling (Watts) 120
Impedance (Ohms) 4
Top-mount Depth (Inches) 2 5/16
Bottom-mount Depth (Inches) 2 5/8
Cutout Diameter or Length (inches) 5 1/2

Product Research



Polyglass Cone: The woofer cone has a cellulose pulp base and is coated with a uniform deposit of hollow glass microballs. The addition of the Polyglass layer significantly increases the cone's rigidity without adding much weight. This combination takes advantage of the accuracy and neutrality of the hard outer surface, but maintains the superior damping characteristics of the cellulose pulp.

Surround: The rubber surround is resistant to ultraviolet rays, temperature extremes, and humidity to add to the speaker's reliability and longevity.

Phase Plug: The bullet-shaped aluminum phase plug in the center of the woofer ensures a smooth, flat off-axis frequency response by preventing the high frequency sound waves emanating from one side of the cone from interfering with sound waves from the other side of the cone.

Aluminum Basket: The woofer features a non-magnetic cast aluminum basket.


Inverted Dome Tweeter: The tweeter is an inverted aluminum dome, producing a broad sound stage. The tweeter has a Neodymium magnet to provide a powerful magnetic field for the voice coil, while still maintaining the tweeter's compact dimensions.

Mounting Options: The tweeter can be surface or flush mounted using the included adapters. Focal recommends flush mounting, but the included angled cup allows surface mounting at one of two angles; approximately 20° and approximately 40°.

Crossover: The included high-pass crossover is attached to the tweeter only; the woofer uses its natural mechanical roll off. The crossover slope is 12 dB/octave and the crossover point is 4,300 Hz.



  Flush Mount 20° Surface Mount 40° Surface Mount
Mounting Height 0.172" 1.207" 1.522"
Mounting Depth 0.795" (1.47" including screw) 0.675" (screw depth) 0.675" (screw depth)
Frame Diameter 1.994" N/A N/A
Cutout Diameter 1.797" N/A N/A
Width N/A 1.770" 1.770"
Surface Depth N/A 1.815" 1.742"


  • Width: 1.214"
  • Height: 0.975"
  • Depth: 3.125"

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

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